CN111637741A

CN111637741A - Tunnel kiln

Info

Publication number: CN111637741A
Application number: CN202010659890.2A
Authority: CN
Inventors: 崔恒全; 于银龙; 夏宏武; 杨世玉
Original assignee: Nantong Hengda Machinery Manufacturing Co ltd
Current assignee: Nantong Hengda Machinery Manufacturing Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-09-08

Abstract

The invention provides a tunnel kiln, which comprises a ring rail and a kiln chamber connected with the ring rail, and further comprises a first gate, a second gate, a third gate and a telescopic kiln chamber, wherein the kiln chamber is sequentially divided into a wet blank preheating and moisture discharging telescopic section, a wet blank drying section, a dry blank preheating section, a roasting section, a heat preservation section and a cooling section, and the tunnel kiln has the advantages that: the pollution-free discharge is carried out, and the roasting energy is saved.

Description

Tunnel kiln

Technical Field

The invention relates to a brick and tile machine, in particular to an annular tunnel kiln for firing green bricks.

Background

When wet blanks of a tunnel kiln enter the kiln for drying, a large amount of air is sucked by mistake due to moisture-removing negative pressure, so that the oxygen content of gas discharged from a desulfurizing tower exceeds the standard. In addition, the existing tunnel kiln generates a large amount of heat loss in the roasting process, and the fire protection capability is not strong, so that the energy loss is caused.

Disclosure of Invention

The invention provides a tunnel kiln, wherein a pre-drying section of the tunnel kiln can stretch and retract when moving forward, so that smoke can reach the standard of lower oxygen content and be discharged; the fire protection capability of the device is obviously enhanced, and the energy saving performance is obviously provided.

The invention provides the following technical scheme: a tunnel kiln comprises a ring rail 1 and a kiln chamber 2 connected with the ring rail 1 in a rail way, and also comprises a first gate 3, a second gate 4, a third gate 5 and a sliding kiln chamber 6, the kiln chamber 2 is sequentially divided into a wet blank drying section 8, a dry blank preheating section 9, a roasting section 10, a heat preservation section 11 and a cooling section 12, the sliding kiln chamber 6 is connected with the circular track 1 in a rail way, the sliding kiln chamber 6 can be overlapped with the kiln chamber 2 in a staggered way, the third gate 5 is arranged at the outer end of the sliding kiln chamber 6, the second gate 4 is arranged at one end of the kiln chamber 2 close to the third gate 5, the space between the second gate 4 and the third gate 5 is a wet blank preheating and moisture discharging telescopic section 7, one end of a waste heat pipeline 13 is communicated with the cooling section 12, and the other end of the waste heat pipeline 13 is communicated with the wet blank preheating and moisture discharging telescopic section 7.

Further, the first gate 3 is arranged in the middle of the kiln chamber 2, and the two sides of the first gate 3 are respectively provided with the partition wet blank drying section 8 and the dry blank preheating section 9.

Further, the tunnel kiln contains an inner air draft pipeline 14 and an outer air draft pipeline 15, the inner air draft pipeline 14 and the outer air draft pipeline 15 are merged and then sent into branch pipelines of the wet blank drying section 8, the branch pipelines of the wet blank drying section 8 are connected with a moisture discharge pipeline 16, the moisture discharge pipeline 16 is connected with an underground annular sealing channel 17, and the underground annular sealing channel 17 is connected with a desulfurizing tower 18.

Further, the residual heat pipeline 13 of the tunnel kiln is connected with the wet blank preheating and moisture discharging telescopic section 7 through a fan.

The invention has the beneficial effects that: this tunnel cave includes kiln chamber 2, supplies the rotatory interior, outer circular orbit of kiln chamber 2 promptly the ring rail 1 of this application, waste heat pipeline 13, interior exhaust duct 14, outer exhaust duct 15, and kiln chamber 2 of rotation type tunnel cave is including drying, arranges the tide, preheats, the calcination keeps warm, the cooling. The invention designs three gates on the main body of the rotary tunnel kiln, the first gate is arranged at the separation part of the wet blank drying section 8 and the dry blank preheating section 9, thereby ensuring the sealing performance of the rotary tunnel kiln for completing preheating, roasting, heat preservation and cooling, avoiding bringing the wet steam of the wet blank drying section 8 into the dry blank preheating section 9 to influence the product quality, ensuring the fire protection function required by the rotary tunnel kiln and avoiding the defect that the kiln without a fan cannot protect the fire. The second gate 4 is arranged at the end of the kiln chamber 2 close to the third gate 5, the third gate 5 is arranged at the forefront of the sliding kiln chamber 6 to ensure the sealing of the preheating section of the wet blank, and the two gates are closed alternately when the wet blank enters the rotary tunnel kiln in the roasting process. When the wet blank is dried in a kiln, the oxygen content exceeds the standard due to the fact that a large amount of air is sucked by mistake under the negative pressure of moisture removal. The flue gas of calcination section passes through the pipeline, sets up in the both sides of rotary kiln main part, sends into the stoving section respectively, and the middle gate of dry goods, convenient setting. Clean calcination cooling zone waste heat is sent to the preheating section of wet base with independent pipeline, with the power fan that adds, and the wet base steam of production passes through the fan, carries out nuisanceless emission. Meanwhile, the waste heat pipeline 13 recycles heat to achieve the purpose of energy conservation.

Drawings

FIG. 1 is a schematic view of a tunnel kiln according to the present invention.

Detailed Description

The invention is further described with reference to the following detailed description of embodiments in conjunction with the accompanying drawings.

In fig. 1: the device comprises a ring rail 1, a kiln chamber 2, a first gate 3, a second gate 4, a third gate 5, a sliding kiln chamber 6, a wet blank preheating and moisture discharging telescopic section 7, a wet blank drying section 8, a dry blank preheating section 9, a roasting section 10, a heat preservation section 11, a cooling section 12, a waste heat pipeline 13, an inner air suction pipeline 14, an outer air suction pipeline 15, a moisture discharging pipeline 16, an underground annular sealing channel 17 and a desulfurizing tower 18.

The utility model provides a tunnel kiln, including circular track 1, with circular track 1 track connection's kiln room 2, tunnel kiln still includes first gate 3, second gate 4, third gate 5, slip kiln room 6, kiln room 2 is according to technology order segmentation for wet base stoving section 8, dry base preheating section 9, calcination section 10, heat preservation section 11, cooling section 12 in proper order, and is consistent with the wet base stoving, dry base preheating, calcination, heat preservation, the refrigerated technology chain that carries on in proper order.

The sliding kiln chamber 6 is connected with the circular rails 1 through rails, the sliding kiln chamber 6 can be overlapped with the kiln chamber 2 in a staggered mode, the circular rails 1 comprise inner-layer rails and outer-layer rails, the inner-layer rails and the outer-layer rails are of double-rail structures in the shape of row rails, the kiln chamber 2 is installed on the inner-layer rails, and the sliding kiln chamber 6 is installed on the outer-layer rails, so that the sliding kiln chamber can be overlapped with the kiln chamber 2 in a staggered mode. Third gate 5 is located the outer end of slip kiln room 6, second gate 4 is located kiln room 2 is close to the one end of third gate 5, second gate 4 with the space between third gate 5 preheats row's damp telescopic section 7 for wet base, along with the removal of slip kiln room 6 can adjust second gate 4 with interval between the third gate 5 to real-time change wet base preheats row's damp telescopic section 7's space size. One end of a waste heat pipeline 13 is communicated with the cooling section 12, and the other end of the waste heat pipeline 13 is communicated with the wet blank preheating and moisture discharging telescopic section 7.

The wet blank drying section 8 is positioned between the first gate 3 and the second gate 4, one side of the first gate 3 is sequentially provided with a dry blank preheating section 9, a roasting section 10, a heat preservation section 11 and a cooling section 12, the first gate 3 is arranged in the middle of the kiln chamber 2, and the two sides of the first gate 3 are respectively provided with the wet blank separation drying section 8 and the dry blank preheating section 9. The first gate 3 plays a role in heat insulation and fire protection, and reduces heat loss.

The tunnel kiln contains interior air draft pipeline 14, outer air draft pipeline 15, send into after interior air draft pipeline 14, the combination of outer air draft pipeline 15 the lateral conduit of wet base stoving section 8, wet base stoving section 8 the lateral conduit is connected with row's tide pipeline 16, it is connected with secret annular seal passageway 17 to arrange tide pipeline 16, secret annular seal passageway 17 is connected with desulfurizing tower 18. Finally, the flue gas is discharged in the desulfurizing tower through the layer-by-layer connection of the pipelines.

The waste heat pipeline 13 of the tunnel kiln is connected with the wet blank preheating and moisture discharging telescopic section 7 through a fan. The waste heat pipeline 13 is a pipeline for utilizing waste heat, and the heat cooled and dissipated by the tail section of the kiln chamber 2, namely the cooling section 12, is reused for preheating and moisture removal of the initial wet blank, so that the purpose of saving energy is achieved.

Wherein the desulfurizing tower connected with the underground annular sealing channel 17 is internally provided with a fan, thereby bringing certain power to air draft, forming negative pressure in the pipeline and facilitating the moisture discharge of a kiln chamber. The third gate 5 is in a sealed closed state in the moisture discharging process, the third gate 5 is opened in the blank conveying process, and the kiln chamber 6 is slid to ensure that the annular wet blanks stacked in the middle of the ring rail 1 are conveyed to the wet blank preheating and moisture discharging telescopic section 7 and enter a brick firing process chain. The green bricks to be processed are fixedly stacked and are sequentially calcined by the movement in the kiln chamber. When the finished brick is delivered, the sliding kiln chamber 6 is fixed, the kiln chamber 2 moves, the space of the wet blank preheating and moisture discharging telescopic section 7 is reduced while the kiln chamber 2 moves, then the finished brick sintered at the other end of the kiln chamber 2 is delivered, and the cyclic wet blank feeding and finished product delivery are completed through the action.

Claims

1. A tunnel kiln comprises a circular rail (1) and a kiln chamber (2) connected with the circular rail (1) in a rail way, and is characterized in that the tunnel kiln further comprises a first gate (3), a second gate (4), a third gate (5) and a sliding kiln chamber (6), the kiln chamber (2) is sequentially divided into a wet blank drying section (8), a dry blank preheating section (9), a roasting section (10), a heat preservation section (11) and a cooling section (12), the sliding kiln chamber (6) is connected with the circular rail (1) in a rail way, the sliding kiln chamber (6) can be overlapped with the kiln chamber (2) in a staggered way, the third gate (5) is arranged at the outer end of the sliding kiln chamber (6), the second gate (4) is arranged at one end, close to the third gate (5), of the kiln chamber (2), and the space between the second gate (4) and the third gate (5) is a wet blank preheating and moisture exhausting telescopic section (7), waste heat pipeline (13) one end with cooling section (12) intercommunication, the other end of waste heat pipeline (13) with wet base preheats and arranges moisture telescopic section (7) intercommunication, first gate (3) are located kiln room (2) middle part, the both sides of first gate (3) are respectively do cut off wet base stoving section (8) with dry base preheating section (9).

2. The tunnel kiln according to claim 1, characterized in that the tunnel kiln comprises an inner air draft duct (14) and an outer air draft duct (15), the inner air draft duct (14) and the outer air draft duct (15) are combined and then fed into branch ducts of the wet green drying section (8), the branch ducts of the wet green drying section (8) are connected with a moisture exhaust duct (16), the moisture exhaust duct (16) is connected with an underground annular sealing channel (17), and the underground annular sealing channel (17) is connected with a desulfurizing tower (18).

3. A tunnel kiln according to claim 1, characterized in that the residual heat pipe (13) of the tunnel kiln is connected to the wet blank pre-heating moisture-removing telescopic section (7) by means of a fan.